maimin



H. MAIMIN.

FABRIC CUTTING MACHINE.

APPLICATION FILED MAR. 22. I911 Patmted June 3, 1919.

3 SHEETS-SHEET I.

H. MAIMIN.

FABRIC CUTTING MACHINE.

APPLICATION FILED mm. 22, I917.

1,305,480, Patented June 3, 1919.

3 SHEETS-SHEET 2 Patented June 3, 1919.

3 SHEETS-SHEET 3- mph H. MMMIN.

FABRIC CUTTING MACHINE. APFLIcATmN FILED ms. 22, I917.

UNITED smms @PATENTOFFEIOE HYMANMMMIN;"'0F"$IEW 1,; AssIenoR ToifiMAIMm 00., 11m, A CORPORATION OF NEW "YORK" To all who/Wit may concern. ter,"-"and" ihelhfles"hnjfimgiroi ement in Be it known thsi't I,"I*I?5IKN-=MAiMiN;"a "lnanh'ioffgvr' hfiii e knif e to the" citizenof the United; states; *re'sidiii'gfet' Wednof tlw shetpfiifig"a garattis; we NewYorkmit in the-countyof New' Yo'rkpalso an irnlor lit lflieht in the ineehiinisn'i State of- New York, heke'invented' fiertiii n by fwhieh ithehno'ieiriefifwf thdshitrfaen fio new and useful Improvements in Fabrili 'ing'f'a pEliethsTintO itS' ,efietii e osition Cutting Machines; and I do herehy leii'l1"re' eutoinntitztllyf-hrlngsflabolif the moi einei it the following to'be a full, cleitr, and exriot of 'the knife to ex o'se its lower cutting" description of the invention snch aswillen edge fons'hai" Eni'n In thEpeCificCap-T' nhle others skilled in the mto Wh'ivh it $110 periitiis"disclosedf in "thet patenfl thB kirk pertains to make and use the same. l'ung'fliiit is shdiithtt theknife is lirbPght This invention relates tothdoonstrfldtidn f0r\'v" 2lrci bfl'i easementoftrtins letion to of cloth-cutting machines ofthe'iediprofizltexpose'theiiilttin p'oftioii theqower edg 'e; ing knife type; and theassoeiationtherewith but the entire 'rea'r", fno'n 'eut tiiig edge of of knife-sharpening means, for the iurp6se"the R'nife hliide' re1iiiif1js"ivitl1in' the sheath of faeilitztting and improving theimlf and is Yield thei'eb'jfif fifijfigtfifl m tl sharpening operation, with patti lilel tefi I haie fliseoi eied thptfhetter shari enin f enee to t-heshanpenin'g of the cho pin edge, results iiI'e "2itt:i"ned If "theie" is ini iertedcommonly employed at the lower 'endof re* to thiniifee wiiiigiin fi"inoi eiiint"of such" r-ipreeating knives. a eh'ifra'e terfds lo i iotriide the l'ow'er rl e Although it is a relatively simplmatter far ehoiigh s uifis 'tiall'y'i'o e'leal'hlie s'heejt 1, to sharpen the vertitz'al slioing'edgb of these While iihe"bla'(ie of 'th e lrnife' reiiiz'iiiis to knives Withoutremovingtheknife fronl'ihe 3 griterfileg refii ithih the' enibieb'e "(if o machine, it hasbeen theeommdn 'pra'obit'ief heflflfif"I flflg w jv th "1 we' do 5f; to remove the knife froiifi thefnziehinefol" 'thehhi'febla de is fr jfo heiifi ljndi' fll the purpose of sharpening th wchoppinig 'actiminft 'shzirfienih "stoiies;'whifle the edgeaet its lower end. ln Unitecl Stews" length o-f't e biade is seddfelfhel d 'hi the Patent Number1-,186,-1'88',"gr@nted lib me on shezt'b'hfith'dby the'knifehtilding nieolfinisin' June 6, 1916', I show a eonstrlictionf'of elem With-iiii3; hn1otbr*casiiig In apoofd'a he cutting machine and an arrangement of 'with the lirese'htim ehtionfui therriiiii eithe knife-sharpening apparatus whieh' permits spedifi'ti foriii Uf'd "iiflitiis for 'eaifiyiiigthe the oonvenien tsharpening of tliis ehopplng"" s'harii i'hig rliettfi is more simple the more edge irwithout removin'g the knife from the eiietix e th'sln thd rrspohdilig"zipfitrizttizs machine, provision being made forprdthief-"P in the petefit refer? to. W 1 I ing e1 relative movement between the' knife I heve'shoiv'nflih the aetioirqfinjingfdreiw and its sheath on the standariifor' themur ingsfitlf"prfeiredemlio'iiine t of .the ijn POSBm'Of exposing the lowert'hOIipingedge fventiiihfanfi like isan' "en: of the knife; and a sherpehing apprrufitlis be-' ing eppmefilsjbu the f'di d'slflar ing provided for eilecting the' sharpening eppiiiiet'fis forfilsno art ofthe prair e-1' efterthe edge is so exposed: In thdt patent ventiiiil, an'd ih eieimedin eleo-p hling ap-"fifi there is likewise disclosed"an'arrmgem-nt plieatiomSeiiil'fNoL' 151L196 "file 'hy one in vehi eh the sharpenirigepPMatXis'is at- '-"Henry"BfiBatfir on April"i1 1917) V tachecl to the meehinein sudh a waythet it In the drawings, Figuresi ahdQ eres'ide Pen be swung into andout'of the sharpening "elevations, andFFigsi 3 findfi ale fioht" ele- L relation to the edge of the knife, und lion vatiohsfif a cloth-cuttiii' in'aiihiiie EOnStI'u'cE-IOO 1,3O5 80 Specification of Lettersntern. 1

and the 'motor easing whi'eh earries'the knife so that when the sharpening attet-hrnent 'is sharpening.

The present invention donstitutesfa'in iin-iarly illus'tratifi'gllhe knife sliiirpenin 1; prominent of the construction "and 'modeof pemtns'twhirhiifol msthe silljeet'rhetter bf operation of machines of that general characanother application, Figs. 7 and 8 being sectionzil views taken, respectively, on the line 7? of'Fig. 4, and on the line 88 of Fig. 2, and Figs. 9 and 10 showing details of construction.

By reference to Figs. 1, 2, 3 and 4, it will be seen that the footplate 12 of the machine is provided with the usual ramp 13, so that the foot-plate may be advanced under the fabric to be cut, and the standard 14, rising from the foot-plate, has the usual sheath for the knife 17 provided with the front slicing edge 16 and the bottom chopping edge 15. The machine has the usual motor 18 and easing 19'whieh carries the knife and incases the knife-driving connections which may be of any suitable character known to the are, and which are not here illustrated.

The upper end 14 of the standard 14 is preferably squared, as indicated in Fig. 5, and projects within an enlarged recess 22 in the casing 19. A bolt 21, having a nut 24', extends through the casing and through an enlarged bore 23 in the enlargement 11* of the standard, thus securing the casing to the standard in such a way as to permit a limited relative movement between the standard and the casing, as illustrated in Fig. 2. It will be seen that the movement is such as to swing the lower end of the knife forward to expose the chopping edge 15, while the knife is held by the casing and its blade is embraced by the sheath in the standard, as shown. This swinging movement is efl'ected by means of a camshaft, best illustrated in Fig. 5, and having at one end a cylindrical portion 26 supported in a bearing in the casing 19 and extended in a screw-threaded portion which receives the nut 27 which sets into a recess 28 and which is held in place by the screw-cap 27. On the other end of the cam-shaft is a cylindrical portion29 journaled in the sleeve of a gear 30 which is locked against rotation in the housing 19 by means of a key. The intermediate portion of the .CfiJlIl-Sllfl-fi', is an eccentric cylinder '20 "journals in the portion 14, of the Standard, the setting of the eccentric being .suchjthatwhen the shaft is rotated, by swlngin {the knifesharpening attaphment from .t e. position shown. in Fig. 1 to the position shown in Fig.2, the housing will betipped, with, respect to the standard, to roj ect. thclowerchopping edge of the knife i ro n its sheath. I The knife-sharpening apparatus is carried by a vertical portion 31 of an arm 31 which terminates at its'u-p er end in a yoke 32 embracing a block 331ntegral with the camshaft and constituting a bearing for an axle 34915 which. the yoke .32 is rotatable. Loose on, the shaft 34 between the block 33 and one arm of the yoke 32 is the bevel pinion 40 which meshes with the fixed bevel pinion 30., andthe yoke 32 carries a pin 41 extending into a slot 42;. in the gear 40, so

that the arm 31 has a liniited swinging movement with respect to the gear 40. For the purpose of retaining the arm 31 in its elevated position, shown in Figs. 1 and 3, there is secured to the yoke 32, in such manner as to rotate with the yoke on the axle 34, a latch 36 adapted to engage a notch 37 in the standard, and to be held in the extreme position shown in Fig. 1 by the falling tendency of the arm 31. The operation of these parts is follows. During the cuttin operation, the arm 31 stands in the position shown in Figs. 1 and 3, and in this position the pin 411 is in contact with, or close to, the terminal 42* of the slot 42. To unlatch the arm 31, it is turned slightly in a direction away from the observer in Figs. 1 and 3, until the latch 36 clears the notch 37. Thereupon the arm 31 is turned in a clockwise direction, turning with it the cam-shaft and the eccentric cam "25, and this i'novement is continued until the casing 19 and the knife carried thereby are brought into the tilted position shown in Fig. During the first part of this movement, the pinion 40, meshing with the pinion 30, is turned on the axle 34 in a clockwise direction as viewed in Fig. 6, untilthe terminal 12* of the slot 42 engages the pin 41. This in effect establishes a connection between the gear 40 and the arm 31, so that a further rotation of the arm 31 on the axis of the cam-shaft gives rise to a simultaneous rotation of that arm, driven by the gear 40, on the axle 34, so that the arm, which has theretofore swung in a vertical plane, is automatically swung inward to ring the knife-sharpening devices in line with the knife, as shown in Figs. 2 and 4. When this inward swing of the arm is completed, and sharpening-apparatus is brought directly in line with the knife, the movement is stopped by the engagement of a stop 35 with the side of the casing, as illustrated best in. Fig. i.

Although I prefer to use the latch 3637 as shown,.it will be understood that the parts may be so tightened that friction alone will hold the arm in its elevated position as shown in Figs. 1 and 3.

The arm 31 carries suitable knife-sharpening apparatus equipped with a pair of sharpening stones, together with mechanism for wiping those stones across the edge of the knife to sharpen it. Any-suitable knifesharpening apparatus operating in this way may be emfployed. I have shown, for the purposes 0 illustration, a particular form of apparatus which forms the subject matter .of the above-mentioned co-pending patent application filedby Henry B. Batjer. This apparatus is. best shown in Figs. 7 to 10, inclusive, of the drawings. The vertical.

tion 31 of the arm .31 carries a guide-b 15"" 46 secured in place by a pin or screw 47 and having an extended hub 48 which passes through a recess in the lower end of the arm. Journaled in this hub -18 is a crank shaft -19 carrying a crank 50 and handle 51. Mounted for limited reciprocation on the guide-block l6 is a frame 53 having a tongue and groove connection with the guide block. The frame 53 has a guide-way 54 in which is mounted for limited vertical re ciprocation a frame 55 held in place by the strap 56. On the end of shaft 49 is a cam 52 which. rotates within the frames 55 and 53. The frame 55 has a depending arm 59 pivotally connected to a rocking-bar 57 pivoted at 58 to a central depending enlargement of the frame 53. This rocking-bar lies under the bars 62 and 63 which are carried by blocks (30 pivoted on pins 61 in depending ears of the frame 53, and carrying at their outer ends the supports which may be adjust-ably clamped by set-screws 67 to the bars 62 and G3, and which carry sharpening stones 66. Coil springs 64. are preferably provided for the purpose of holding the arms 62 and63 against the engaging surfaces of the rocking-bar 57. It will be observed that with this construction, a rotation of the shaft 49 by means of the handle 51 will turn the cam This will result in moving the sharpening stones 66 from side to side and up and down. The cam is so shaped that the movement has the following sequence, beginning with the parts in the position shown in Fig. 8. In this position. the right hand stone is elevated. and the left-hand stone is depressed. and the sharpening attachment stands in an intermediate position of its sidewise movement, so that neither stone is in contact with the knife-blade. A rotation of the cam in a counter-clockwise position, as shown in Fig. 8, first moves the frame 53 to the right until the lowered stone 66 comes in contact with the edge of the knife and is pressed against it sufficiently to flex the edge somewhat and effect a good sharpening engagement. There'upon the sidewise movement of the frame is discontinued and the further rotation of the cam lifts the frame and causes an upward wiping u'iovement of the stone 66 across the edge of the knife. lVhile this sharpening movement of the stone is in progress, the frame stands still and after the first stone 66 is entirely lifted and the other stone is entirely depressed, further rotation of the cam moves the frame 53 to the left, bringing the now lowered stone into sharpening contact with the other side of the knife edge, whereupon the sidewise movement stops and the second stone is wiped across the edge of the knife while the other stone, out of contact with the knife-edge. is depressed. At the end of this movement the cam comes back to the position shown in Fig. 8.

From what has been said, it will be understood that, although the preferred combination of my invention includes an arrangement by which the sharpenen-carrying arm autonmticall; effects the tilting of the knife, and also includes a knife-sharpening apparatus having a pair of sharpeningstones which are alternately wiped across opposite sides of the chopping edge of the knife; nevertheless. the separate elements or sub combinations of the invention are individually of value and may be used independently of one another. Thus, it is broadly new, so far as I am aware, to tilt the knife with respect to the standard for the purpose of bringing its chopping edge into the above-mentioned advai'itageous relation to the sharperling-stones, and the appended claims are intended tocover broadly the described mechanism for effecting that result. and its equivz-ilent, whether the tilting mechanism is actuated by the sharpener-carrying arm or otherwise- So, also, the particular mount of the sharpener-carrying arm by means of which it may be given the described downwardly and inwardly sweeping movement may be made use of, whether this movement of the arm affects the tilting or not.

Obviously the described means for actuatingthe sharpening-stones is of general application, and it is for this reason that claims for this specific apparatus have been included in a separate application.

I claim:

1. In a fabriccutting machine. the cone bination with a standard and a knife adapted to be reciprocated in a straight line, of means for inclining the knife relatively to the standard to extend the loweredge of the knife for sharpening, substan tially as described.

2. In a fabric-cutting machine. the combiuatiou with a standard having a knife sheathing groove and a knife carrier supported on the standard and having mechanism for reci 'n'ocating the knife in a straight line, of means for tilting the knifecarrier on the standard to project the lower edge of the knife for sharpening. substantially as described.

3. In a motor-driven fabric-cutting machine, the combination with a standard. a motor housing on the standard. and a reciprocating knife driven by the motor and guided by the standard, of a tilting connection between the housing and the standard whereby the housing may be tilted relatively to the standard to extend the lower edge of the knife for sharpening, substantially as described.

4. In a motor-driven fabric-cutting machine, the combination with a standard, a motor housing on the standard, and a reciprocating knife driven by the motor and guided by the standard, of a shaft jourualed in the housing, and an eccentric on the shaft to engage the standard to cause the housing to be tilted relatively to the standard to protrude the lower portion of the knife from the standard for sharpening, substantially as described.

5. In a motor-driven fabric-cutting machine, the combination with a standard, a motor housing on the standard, and a reciprocating knife driven by the motor and guided by the standard, of a shaft havin hearings in the housing and in the standar an eccentric on the shaft working in one of the bearings, and means for rotating the shaft to cause relative movement be tween the housing and the standard to protrude the knife for sharpening, substantially as described.

6. In a fabric-cutting machine, the combination with a standard, a reciprocating knife and a support and actuating mechanism for the knife, of a device pivoting the support and the standard together, an arm for operating the device to tilt the support relatively to the standard to project the lower end of the knife for sharpening. and a sharpening mechanism carried at the outer end of the arm for sharpening the lower edge of the Knife when the same is projected, substantially as described.

7. In a fabric-cutting machine, the combination with a standard, a reciprocating knife and a support and actuating mechanism for the knife, of a device pivoting the support and the standard together, an arm for operating the device to tilt the support relatively to the standard to project the lower end of the knife for sharpening, and a sharpening mechanism carried by the arm and adapted to be brought into operative relation to the lower edge of the knife when the same is pro ected, substanlially as described.

H. In a fabric-cutting machine, the combination with a standard, a reciprocating knife and a support and actuating mechanism for the knife, of a device pivoting the support and the standard together and actuable to protrude the knife for sharpening, an arm universally jointed to the pivoting device, and a sharpening mechanism carried by the arm, whereby the arm may be given a downward and inward sweep to move the sharpening mechanism from a retracted position into a sharpening position and to simultaneously project the lower end of the knife into sharpening relation with the sharpening stones, substantially described.

9. In a fabric-cutting machine, the combination with a standard, a reciprocating knife and a support and actuating mechanism for the knife, of a device pivoting the support and the standard together and actuable to protrude the knife for sharpening, an arm universally jointed to the piv oting device, and a sharpening mechanism carried by the arm and having a pair of sharpening stones and actuating mechanism to wipe the stones alternately across opposite sides of the lower edge of the knife, whereby the arm may be given a downward and inward sweep to move the sharpening mechanism from a retracted position into a sharpening position and to simultaneously pro; ect the lower end of the knife into sharpening relation with the sharpening stones, substantially as described.

10. In a fabric-cutting machine, the combination with a standard and a knife-carrier supported thereon, of a tilting shaft coupling the standard and the knife-carrier, an arm mounted upon the shaft for rotation on an axis at an angle to the shaft, and connections whereby the rotation of the arm and the tilting shaft causes a simultaneous rotation of the arm on the said axis to give the outer end of the arm a substantially spiral movement, and a sharpening mechanism carried by the outer end of the arm, substantially as described.

11. In a fabric-cutting machine, the combination with a standard and a knife-carrier supported thereon, of a tilting shaft coupling the vstandard and the knife-carrier, an arm mounted upon the shaft for rotation. on an axis at an angle to the shaft, and connections whereby the rotation of the arm and the tilting shaft causes a simultaneous rotation of the arm on the said axis to give the outer end of the arm a substantially spiral movement, said connection including certain lost motion permitting some rotation of the arm and tilting shaft unaccompanied by rotation of the arm on the said axis, whereby the sharpening mechanism may be swung from a retracted elevated position at one side of the knife support to a lowered shar uuiing position in line with the knife, and a sharpening mechanism carried by the outer end of the arm. substantially as described.

12. In a fabric-cutting machine, a sharpening attachment, an arm carrying the said attachment and a support for the arm on the machine. said support including two axles, one of which is carried by the other and lies at an angle thereto. and connections whereby the rotation of the arm and one of the axles causes a sinmltaneous rotation of the arm on the other axle, to impart a substantially spiral movement to the outer end of the arm, substantially as described.

13. In a fabric-cutting machine, a shapening attachment, an arm carrying the said attachment and support for the arm on the machine, said support including two axles, ,one of which is carried by the other and lies at an angle thereto, and connections whereby the rotation of the arm and one of the axles causes a simultaneous rotation of the arm on the other axle, said connection including a certain lost motion so that some movement of the arm and the said first axle may occur without corresponding movement of the arm on the second axle, whereby the sharpening device may be brought from an elevated retracted position at one side of the machine to a lowered sharpening posi tion in line with the knife to be sharpened, substantially as described.

14. In a fabric-cutting machine, the combination with a standard and a reciprocating knife, of means for inclining the knife rela tively to the standard to extend the lower edge of the knife for sharpening, and sharpening means movably mounted on said standard and adapted to be brought into operative relation with the lower edge of the knife when the same is extended. substantially as described.

15. In a fabric-cutting machine, the combination with a standard, having a knifesheathing groove, and a knife-carrier supported on the standard and having mechanism for reciprocating the knife, of means for tilting the knife-carrier on the standard to project the lower edge of the knife for sharpening, and sharpening means movably mounted on said standard and adapted to be brought into operative relation with the lower edge of the knife when the same is projected.

16. In a motor-driven, fabric-cutting machine, the combination with. a standard, a motor housing on the standard. and a reciprocating knife driven by the motor and guided by the standard, of a tilting connection between the housing and the standard whereby the housing may be tilted relatively to the standard to extend the lower edge of the knife for sharpening, and sharpening means movably mounted on said standard and adapted to be brought into operative relation with the lower edge of the knife when the same is extended.

17. In a motor-driven, fabric-cutting machine, the combination with a standard, a motor housing on the standard, and a re ciprocating knife driven by the motor and guided by the standard, of a shaft journaled in the housing, an eccentric on the shaft to engage the standard to cause the housing to be tilted relatively to the standard to protrude the lower portion of the knife from the standard for sharpening, and sharpening means mounted on said shaft and adapted to be brought into position for sharpening the lower edge of the knife when the same has been protruded by movement of the same, substantially as described.

18. In a motor-driven, fabric-cutting machine, the combination with a standard, a motor housing on the standard, and a reciprocating knife driven by the motor and guided by the standard, of a shaft having bearings in the housing and in the standard, an eccentric on the shaft working in one of the bearings. means for rotating the shaft to cause relative movement between the housing and the standard to protrude the knife for sharpening, and sharpening means mounted on said shaft and adapted to be brought into position for sharpening the lower edge of the knife when the same has been protruded by movement of the shaft, substantially as described.

In. testimony whereof I aflix my signature.

HYMAN MAIMIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent: Washington, I). G. 

